So this week, choose from one of the prompts below the fold, and post your reply (250 words or less, please!) in the comments. We'll highlight some of our favorites (and maybe even send some surprises your way). We also hope you'll comment on each others' replies.

Alex Tabarrok of George Mason University talks to EconTalk host Russ Roberts about a recent paper Tabarrok co-authored with Shruti Rajagopalan on Gurgaon, a city in India that until recently had little or no municipal government. The two discuss the successes and failures of this private city, the tendency to romanticize the outcomes of market and government action, and the potential for private cities to meet growing demand for urban living in India and China.

Nassim Nicholas Taleb, author of Antifragile, Black Swan, and Fooled by Randomness, talks with EconTalk host Russ Roberts about a recent co-authored paper on the risks of genetically modified organisms (GMOs) and the use of the Precautionary Principle. Taleb contrasts harm with ruin and explains how the differences imply different rules of behavior when dealing with the risk of each. Taleb argues that when considering the riskiness of GMOs, the right understanding of statistics is more valuable than expertise in biology or genetics. The central issue that pervades the conversation is how to cope with a small non-negligible risk of catastrophe.

Greg Page, former CEO of Cargill, the largest privately-held company in America, talks to EconTalk host Russ Roberts about the global food supply and the challenges of running a company with employees and activity all over the world. Page talks about the role of prices in global food markets in signaling information and prompting changes in response to those signals. Other topics include government's role in agriculture, the locavore movement and genetically modified organisms (GMOs).

Joshua Greene, of Harvard University and author of Moral Tribes: Emotion, Reason, and the Gap Between Us and Them, talks with EconTalk host Russ Roberts about morality and the challenges we face when our morality conflicts with that of others. Topics discussed include the difference between what Greene calls automatic thinking and manual thinking, the moral dilemma known as "the trolley problem," and the difficulties of identifying and solving problems in a society that has a plurality of values. Greene defends utilitarianism as a way of adjudicating moral differences.

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Music from Cleared up Sunset, by Yasuhiro Tsuchiya / unplug
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